He was one of the organizers of summer camps "Otokultivator" on island Vis (together with URK Močvara & EASA Croatia) and SummerSource (together with TacticalTech).

Marcell participated in curating or producing mi2 yearly exhibitions I Am Still Alive (2001) and re:Con (2002), free culture, science and technology festival Freedom to creativity! (2005) and in conceptual exhibition System.hack() (2006). He is a member of Creative Commons Team Croatia.